Specification:Power by: inbuilt 480 mAh lithium batteryContinuous working:60-hour / Standby time: 120 days / Full charged time:4-hourSleep time: 5 seconds after stop usingKey Life: 3 Million strokesDimensions: 43.3cm x 11.9cm x 1.8cmThe switch is on the top right corner of the keyboard1. [Easy Setup]: Simply insert the USB receiver into your computer and use the keyboard instantly.2.[Ergonomic design]:Aluminum alloy panel material, low-profile keys offer quiet and comfortable typing.3.[4 Month Battery Life]: Rechargeable lithium battery with an industry-high capacity lasts for 4 months with single charge .Ultra Thin and Light: Compact size and light weight but provides full size keys, arrow keys, number pad, shortcuts for comfortable typing.4.[Strong Durability]:The wireless keyboard mouse can withstand 3 million clicks. It also comes with anti-slip, swearproof and fingerprint prevention performance, provide you a fantastic hand feeling.